package com.qianya.util;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;
import java.net.URI;

/**
 * IP地址
 * 
 * @Author lhl
 * @email 1213420067@qq.com
 * @Date 2020年07月14日
 */
public class IPUtils {
	private static Logger logger = LoggerFactory.getLogger(IPUtils.class);

	/**
	 * 获取IP地址
	 * 
	 * 使用Nginx等反向代理软件， 则不能通过.getRemoteAddr()获取IP地址
	 * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
	 */
	public static String getIpAddr(HttpServletRequest request) {
    	String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
        	logger.error("IPUtils ERROR ", e);
        }
        
//        //使用代理，则获取第一个IP地址
//        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
//			if(ip.indexOf(",") > 0) {
//				ip = ip.substring(0, ip.indexOf(","));
//			}
//		}
        if("0:0:0:0:0:0:0:1".equals(ip)) {
        	ip = "127.0.0.1";
        }
        return ip;
    }

	public static Object getDomain(URI uri) {
		URI effectiveURI = null;
        try {
            effectiveURI = new URI(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(), null, null, null);
        } catch (Throwable var4) {
            effectiveURI = null;
            return null;
        }
        return effectiveURI.toString().substring(effectiveURI.toString().indexOf("://")+3, effectiveURI.toString().length());
	}
    /**
     *  将字符串形式IP地址转换long类型
     * @param ip
     * @return
     */
    public static long getIp2long(String ip) {
        ip = ip.trim();
        String[] ips = ip.split("\\.");
        long ip1 = Integer.parseInt(ips[0]);
        long ip2 = Integer.parseInt(ips[1]);
        long ip3 = Integer.parseInt(ips[2]);
        long ip4 = Integer.parseInt(ips[3]);
        long ip2long =1L* ip1 * 256 * 256 * 256 + ip2 * 256 * 256 + ip3 * 256 + ip4;
        return ip2long;
    }
    /**
     * 判断一个ip地址是否在某个ip段范围内
     * @param ip
     * @param startIP
     * @param endIP
     * @return
     */
    public static boolean ipExistsInRange(String ip, String startIP, String endIP) {
        return (getIp2long(startIP)<=getIp2long(ip)) && (getIp2long(ip)<=getIp2long(endIP));
    }
	
}
